No, he means the turn signal switch. Can you be more specific about what you mean by "stay on"?
Does the light come on, but do not flash?
---then its a relay issue--- swap in a new flasher relay.
Or
Once you click the switch up for right hand turn and make a right hand turn do the signal keep flashing?
--- then the turn signal canceler ring is broke. swap in a new turn signal switch assembly.
Or
Does the turn signals light up and won't turn off even with the switch in neutral?
---bad buld, filament issue like mentioned, or a wiring short--locate and repair short.
does this happen with the Headlights on or off?